– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Mon 21 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 21 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 10°C on Wed morning). Wind will be generally light. | Days 4–6 Weather SummaryHeavy rain (total 38mm), heaviest during Thu afternoon. Very mild (max 15°C on Sat afternoon, min 7°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | |  | |  |  |  | | | | |  |  | |
some clouds | clear | some clouds | clear | clear | rain shwrs | some clouds | rain shwrs | some clouds | light rain | mod. rain | heavy rain | mod. rain | rain shwrs | rain shwrs | clear | cloudy | light rain | |
Cloud base (m) | 6100 | 2200 | 2050 | 1800 | 6050 | 2450 | 650 | 550 | 600 | 650 | 1750 | 1800 | 6800 | |||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | 0.2 | — | 0.4 | — | 0.2 | 10 | 18 | 8 | 2 | 0.1 | — | — | 0.1 |
max °C | 18 | 20 | 14 | 14 | 15 | 11 | 13 | 15 | 11 | 13 | 11 | 10 | 8 | 10 | 8 | 12 | 15 | 12 |
min °C | 16 | 18 | 11 | 11 | 15 | 11 | 10 | 14 | 11 | 12 | 10 | 8 | 7 | 9 | 7 | 7 | 15 | 10 |
chill °C | 16 | 18 | 11 | 11 | 15 | 11 | 10 | 14 | 11 | 12 | 10 | 7 | 6 | 8 | 6 | 6 | 15 | 10 |
Freezing level m | 3650 | 3500 | 3250 | 2750 | 2650 | 2400 | 2300 | 2600 | 2850 | 2450 | 2300 | 2050 | 1700 | 1850 | 2050 | 2450 | 2700 | 2300 |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Warm (max 20°C on Mon afternoon, min 10°C on Wed morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Heavy rain (total 38mm), heaviest during Thu afternoon. Very mild (max 15°C on Sat afternoon, min 7°C on Fri morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
SHIP3046 | |||||
Skagit Burlingto / t Vernon Airport |  | ||||
SHIP4813 | |||||
SHIP1047 | |||||
SHIP6249 | |||||
SHIP1106 | |||||
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.